Engine Oil Analysis

Using biodiesel blends may require reduced engine oil drain intervals. Strictly follow the oil change intervals published Lube Oil Requirements manual (DDC-SVC-BRO-0001).

Biodiesel may accelerate acid formation in the engine oil.

Biodiesel fuel dilution is very harmful to the engine oil and will not evaporate from the engine oil as easily as diesel fuel.

Biodiesel fuel dilution will reduce the oil viscosity and accelerate oil degradation, requiring reduced oil drain intervals.

Used oil analysis is required for the first few oil changes after converting to biodiesel blends to check for fuel dilution and to confirm the proper oil drain interval. Detroit Genuine Oil Analysis Program is recommended.